Saving Wetlands. Is saving Lives

Transcription

1 Saving Wetlands Is saving Lives

2 What are Wetlands? areas between water and land

3 What are Wetlands? contain hydric soil - saturated by water. soil lacks oxygen when saturated land that is seasonally wet. habitat for many aquatic and terrestrial species. Some found only in wetlands. Wetland plants known as hydrophytes.

4 Formation of Wetlands Driven by location. Sediment deposited along river. Sediment deposited at the mouth of the river. Sediment fills in aging lakes. Artificial wetlands from oil sands. Effort to reclaim wetlands destroyed by mining for oil.

5 Types of Wetlands There are Three Major Types of Wetlands: Marshes Bogs Swamps

6 Marshes areas where the soil is periodically or permanently flooded with water. dominated by soft stemmed grasses have shallow water.

7 Marshes Marsh plants: - cattails - rushes - bur weed - water lilies Marsh animals can be very diverse. - Green heron

8 Bogs Associated with evergreens Usually found in areas with short growing seasons and lower temperatures. ph less than 5

9 Bogs Little or no drainage Acidified by rotting vegetation, Some open water surrounded by a floating mat of sedges, sphagnum mosses, and other acid-loving species. A quagmire, which trembles or gives way underfoot.

10 Swamps dominated by trees and shrubs (woody plants) often occur along river floodplains, subtropical to tropical coasts and in quiet lakes. inhabited by an abundant variety of animals

11 Types of wetlands in the US Coastal/Tidal wetlands: salt water and fresh water mix due to tidal action. Found around the Gulf, Atlantic, Pacific and Alaskan coasts. Regional example is Jamaica Bay.

12 Types of wetlands in the US Inland wetlands: Include marshes, swamps, and wet meadows. Great Swamp in New Jersey.

13 Functions of Wetlands Improves water quality. Reduces flood and storm damage. Regulates water levels in watersheds. Provides wildlife habitats

14 Functions of Wetlands (con t) Wetlands protect terrestrial areas adjoining them from storms, floods and tidal damage. Plants in wetlands help to filter pollutants in the water. Wetlands provide an excellent example of invasion, modification and succession.

15 WHAT DO WETLANDS PROVIDE? support more wildlife and plants than any other kind of habitat. Provide nesting and feeding grounds for both resident and migratory birds, including game bird, waterfowl, and songbirds.

16 Wetlands Supply habitat for 212 animals in Western Washington 285 species in the eastern region of the state. can produce up to 1,300 pounds of fish per acre.

17 Biodiversity of Wetlands (Nattha) Wetland serves as a home for many plants and animals, ranging from invertebrates, fishes, birds, to the endangered species such as Great Hornbill and wandering shrew. Shrew Arrowheads N. American River Otter Pickerel Weed Great Blue Heron Great Hornbill

18 It provides animals a variety of food as well as shelter to hide from their predators. Cricket Frog Yellow Rat Snake Mangrove catfish Many plants and animals have adjusted themselves into the wet environment. Crayfish Bluegill mudskipper

19 cattail Plants There are three types of plants in wetlands: the emergents, Purple loosestrife the submergents, coontail and the floating plants pondweed arrowhead bloodroot Skunk cabbage duckweed Yellow lotus

20 What happens to the wetlands? Some wetlands continue to exist but are degraded by the effects of fertilizers, pesticides, and oil runoff.

21 Destruction of wetlands: Intrusion of nonnative species Draining wetlands for agricultural purposes and mosquito control Dikes and dams to form ponds and lakes Pollution from landfills Removal of vegetation Air pollution

22 The Disappearing Wetlands loss of 70,000-90,000 acres per year in the U.S. (EPA) More than half have turned into land. Acres lost to new houses, businesses and farms.

23 In 200 years 11% 5%

24 Fish & Wildlife Service: National Wetlands Inventory (NWI) 1982 Report to Congress, re: 1950s to 1970s 9.2 million acres lost average annual loss of 458,000 acres 87 percent to agriculture Report to Congress, re: 1970s to 1980s 2.6 million acres lost average annual loss of 290,000 acres agriculture largest single reason Recent report: Rate of wetland loss continues to decline.

25 How it Affects the U.S Wetland lost ---> increased salt levels The high amount of salt kills vegetation and trees.

26 How do Wetlands help? a key link in watershed management. protects water quality controls flooding serves as home for many plants and animals. economy has a significant connection to wetlands.

27 Efforts to Conserve Wetlands The Nature Conservancy Proposes: Rehabilitation Construction of new wetlands The U.S Army Corps of Engineers: issue permits to control activities in wetlands. minimize damage to wetlands.

28 Government Action to Preserve Wetlands The No-Net-Loss Plan (Dec. 2002)for every acre of wetland lost, it would be replaced with an acre of artificial wetland.

29 Government Action & Effectiveness Section 404 of the Clean Water Act was enacted to control wetland development This law is not effective and has many loopholes. Few states have wetland programs No true national program to protect wetlands

30 Restoration Needed Wetlands are in poor conditions Man-made wetlands lack a rich biodiversity Need to restore to its natural state Restoration is a very long and complex process.

31 Saving Wetlands Saving Lives